<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>北大青鸟宣传片</title>
</head>
<body>
<video controls autoplay >
  <source src="vedio/vedio.mp4" type="video/mp4"/>
  <source src="vedio/vedio.avi" type="video/avi"/>
</video>
</body>
</html>
